Isolated soy protein strips away most of the fat and carbs, leaving a powder that is 90% protein or more. It is a complete plant protein, supplying all nine essential amino acids your body cannot make on its own.
Vegetarians, vegans, and anyone wanting a lean, low-carb protein turn to it for muscle repair after training. Its neutral taste and high digestibility let it slip into shakes, smoothies, or bars without clashing or grittiness.
Take it within 30 minutes of finishing a workout, or use it as a meal replacement to bump up daily protein. Stir it into water or milk and drink immediately.
Most people handle isolated soy protein well. If you take thyroid medication, separate your dose by at least four hours. Anyone with a soy allergy must avoid it. People with kidney disease need a doctor’s approval before adding any high-protein supplement.